Didn't have the full breakdown, but you can clearly see the girl's investment level in the conversation.
A lot of times guys worry too much about finding the perfect thing to say, while ignoring the biggest indicator of all how much the girl is actually engaging.
Is she asking questions back? Adding to the conversation? Putting effort into her replies?
When a girl is invested, the conversation usually flows naturally. When she's not, even the best lines in the world won't save it.
That's why it's important to look at both sides your communication skills and her level of interest.